Take-ups for sewing machines



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Filed March 4. 1939 I 3 Sheets-Sheet 2 jvwmm Han/i Parry I Iv flkto zm l April 29, 194%.. F. PARRY TAKE-UPS FOR snwnie MACHINES s Sheets-Shet s Filed March 4. 1939 Patented Apr. 29, 1941.

TAKE-UPS FOR SEWING MACHINES Frank Parry, Bridgeport, Oonn., assignor to The Singer Manufacturing Company, Elizabeth, N. 1., a corporation of New Jersey Application March 4, 1939, Serial No. 259,722

14 Claims.

This invention relates to take-ups for sewing machines and more particularly to the actuating mechanism for the rotary type of take-up and has for one of its objectives the provision of an actuating mechanism for rotary take-up elements which is balanced, simple in construction, easily lubricated, compact, free of vibration, and in which the parts to be rotated are light in weight so that they may be accelerated and retarded with the minimum of eifort.

With the above and other objects in view, as will hereinafter appear, the invention comprises the devices, combinations and arrangements of parts hereinafter set forth and illustrated in the accompanying drawings of a preferred embodiment of the invention, from which the several features of the invention and the advantages attained thereby will be readily understood by those skilled in the art. i

.In the drawings, Fig. 1 represents a front elevation of a sewing machine with part of the bracket-arm and head shown in sectionto expose the actuating mechanism for the take-up.

Fig. 2 is a top plan view of the bracket-arm and hollow head, with a portion of the bracketarm and'the hollow head broken away to expose the actuating mechanism located therein.

Fig. 3 is a vertical section taken substantially along the line of 3-3 of Fig. 2.

Fig. 4 is a front end elevation of the machine with the face-plate removed.

In the embodiment of this invention selected for fllustration, l represents the bed of the machine, carrying a standard ll formed with an overhanging portion l2. Secured to the overhanging portion l2 by means of a bolt l3 which passes through the walls l4 and I4 is a bracketarm portion l5 which terminates in the hollow head l5. Journaled in the bearings I3, I! and i1 is a needle-bar actuating shaft l8 having a balance wheel I! secured to one of its ends and a crank secured to its other end. The crank Ill through the link 2| actuates the usual needlebar 22 carrying a needle 22' and journaled in the the needle-bar shaft I! by means of the gears r 21, 21', the vertical shaft 28, and the gears 23, 29'. The ratio of the gears 23, 29' is as 1:2, therefore, the hook-shaft makes two complete rotations for each rotation of the needle-bar shaft ll.

To the end of the shaft2l which terminates beneath the-hollow head there is fixed the usual rotary hook 30 which makes two complete rotations for each reciprocation of the needle.

Journaled in the bushings 3| and 32 which extend through the partition or wall 33 ,which separates the hollow headfrom the bracket-arm are the shafts 34 and 35. To one end of the shaft 34 there is secured a gear 36 which meshes with the gear 31 secured to the needle-bar. driving shaft l8. Theratio of these gears is as 1:2 so that the shaft 34 makes two complete rotations for each rotation of the needle-bar shaft l8. Fixed to one end of the shaft is a gear 38 which meshes with a gear 39 carried by the needle-bar shaft l8 and the ratio of these gears is as 1:1 and, therefore, the shaft 35 makes one complete rotation for each rotation of the needle-bar actuating shaft l8. Fixed to the end of the shaft 34 which extends into the hollow head is a rotary take-up element 40 which is formed by two disks 4| and 42 which are connected together by means of the take-up elements or pins 43, and to the end of the shaft 35 which extends into the hollow head there is secured a take-up element 44 formed from two disks 45 and 45 connected together by the take-up pins or elements 41.

'From the foregoing it will be observed that the take-up actuating shafts 34 and 35 are disposed on opposite sides of the needle-bar actuating shaft 18 and that the shaft 34 makes two complete rotations for each rotation of the shaft 35. It will also be observed that the gears 36, 31, 38 and 39 are disposed within a lubricant chamber 48 formed in the hollow bracket-arm by the spaced walls 33 and M where they may be operated in a bath of oil. a 1

Further, the shafts 34 and 35 rotate in a counterclockwise direction and this direction of rotation of the take-up elements 41 tends to keep excess needle thread from accumulating at the needle-eye during its descending movement.

For a more complete and detailed disclosure of the timing and functioning of the rotary takeup elements reference may be had to the copending application of Sydney Zonis, Serial No. 163.553, filed Oct. 12, 1937.

From the foregoing description considered in connection with the accompanying drawings, the

construction, manner of operation and several advantages of my improved take-up'actuating mechanism will be clearly understood. It is apparent that such a device has a wide variety of uses. and it will be understood that the form,

construction and arrangement of the several elements employedmay be varied. Therefore, the privilege is reserved of resorting to all such connecting said shafts whereby all of said shafts are actuated at uniform angular velocities.

2. A sewing machine having, in combination, a rotary needle-bar actuating shaft, a rotary take-up shaft disposed on one side of said needlebar shaft, a take-up element carried by said take-up shaft, a pair of gears connecting said shafts so that the take-up shaft makes one complete rotation for each rotation of the needle-bar actuating shaft, a second take-up shaft carrying a take-up element and disposed on the other side of said needle-bar shaft and a pair of gears connecting said second take-up shaft and said needle-bar actuating shaft so that said second takeup shaft will make two complete rotations for each rotation of said needle-bar shaft.

3. A sewing machine having, in combination, a rotary needle-bar actuating shaft, a pair of rotary take-up actuating shafts disposed on opposite sides of said needle-bar shaft, take-up elements carried by said take-up shafts, and gearing connecting all of said shafts so that one of said shafts is caused to make a complete rotation for each rotation of the needle-bar shaft and the other of said take-up shafts: is caused to make two complete rotations for each rotation of the needle-bar actuating shaft.

4. In combination with a machine having a rotary hook actuating shaft and a rotary needlebaractuating shaft, a plurality of rotary take-up shafts, take-up elements carried by said take-up shafts, and means operatively connecting all of said shafts so that one of said take-up shafts operates at the speed of the needle-bar actuating shaft and the other of said take-up shafts operates at the speed of the hook shaft.

5. A sewing machine having, in combination, a rotary needle-bar actuating shaft, 2, pair of take-up shafts operable about spaced axes, takeupelements thereon, means for rotating one of said take-up shafts, and means for rotating the other of said shafts a plurality of times for each rotation of the first mentioned take-up shaft.

6. A sewing machine having, in combination, a rotary needle-bar actuating shaft, a needle actuated thereby, a plurality of take-up shafts operable about spaced axes, take-up elements carried by said shafts for controlling the thread for the needle, and means operatively connecting all of said shafts whereby said shafts are actuated at uniform angular velocities.

7. A sewing machine having, in combination, a rotary needle-bar actuating shaft, two parallel take-up shafts disposed on opposite sides of said needle-bar shaft, take-up elements carried by said take-up shafts and operating on the same thread, and means connecting all of said shafts for actuating said shafts at uniform angular velocities.

8. A sewing machine having, in combination,

a rotary needle-bar actuating shaft, two take-up shafts arranged parallel to each other and parallel to the needle-bar actuating shaft, said takeup shafts being operable about spaced axes, takeup elements carried by said take-up shafts, and means connecting all of said shafts whereby one of said take-up shafts is operated at the speed of the needle-bar shaft and the other take-up shaft is operated at twice the speed of the needle-bar shaft.

9. A sewing machine having, in combination, a bracket-arm terminating in a' hollow head, a partition separating the bracket-arm from the hollow head, a plurality of takeup actuating shafts journaled in said-partition, take-up elements carried by the ends of the take-up shafts which extend into the hollow head, and means within the bracket-arm for operatively connecting all of said shafts for operation at uniform angular velocities.

10. A sewing machine having, in combination, a bracket-arm formed with two partitions forming therebetween an oil-reservoir, a plurality of take-up shafts journaled in one of said partitions, take-up elements carried by said take-up shafts, a needle-bar actuating shaft passing through both of said partitions, and gearing located within the bracket-arm and between said partitions for connecting all of said shafts.

11. A sewing machine having, in combination, two parallel rotary take-up shafts operable about spaced axes, take-up elements carried by said shafts, a reciprocatoryneedle, a shaft for actuating said. needle, and means for rotating one 01' said take-up shafts once for each rotation of the needle-bar actuating shaft and means for actuating the other of said shafts a plurality of times for each rotation of the needle-bar shaft.

12. A sewing machine having, in combination, a bracket-arm terminating in a hollow head, a wall separating the bracket-arm from the hollow head, a plurality of take-up shafts extending through said wall, take-up elements carried on the ends of the take-up shafts which extend into the hollow head, and mechanism within the bracket-arm for rotating said shafts in the same direction.

13. A sewing machine having in combination, a needle, a rotary shaft for reciprocating said needle, a rotary hook cooperating with said needle in-the formation of stitches, means for actuating said hook a plurality of times for each needle reciprocation, a pair of take-up shafts, means for rotating one of said shafts at the speed of the hook and the other shaft at the speed of the needle-bar shaft, and take-up elements carried by said take-up shafts and acting on the needlethread.

14. A sewing machine having, in combination, an overhanging bracket-arm carrying a hollow head, a rotary needle-bar actuating shaft journaled in said arm, a thread-carrying needle actuated by said shaft, a rotary hook cooperating with said needle in the formation of stitches, a

plurality of parallel take-up actuating shafts arranged in said bracket-arm, a take-up element carried by each of said take-up shafts and opcrating on the needle-thread in series and means 1' for rotating said take-up shafts at a uniform angular velocity.

FRANK PARRY. 

